It seems that only I can create Platoon emblems. If you would create on in that ingame tool I am sure we can workout a way to get me upload it.

I saw the option to edit the platoon emblem as a member but it was greyed out. Maybe need to be promoted? Otherwise, there's no other way I can export an already created emblem. Here's the BF4 one - still classy. (Hard to see here but there's a thin white strip on the top and bottom lining.)